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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2017 dubenju@126.com.<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package org.teapot.db.orm.mdl;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.util.ArrayList;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.List;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>/**<a name="line.22"></a>
<span class="sourceLineNo">023</span> * where clause<a name="line.23"></a>
<span class="sourceLineNo">024</span> * 数据库SQL的条件类.<a name="line.24"></a>
<span class="sourceLineNo">025</span> * WHERE 子句<a name="line.25"></a>
<span class="sourceLineNo">026</span> * @author dubenju@126.com<a name="line.26"></a>
<span class="sourceLineNo">027</span> * @since 0.0.1<a name="line.27"></a>
<span class="sourceLineNo">028</span> */<a name="line.28"></a>
<span class="sourceLineNo">029</span>public class Condition implements IClause {<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>  /* 01. AND, OR, NOT */<a name="line.31"></a>
<span class="sourceLineNo">032</span>  public static final String AND = " AND ";<a name="line.32"></a>
<span class="sourceLineNo">033</span>  public static final String OR  = " OR ";<a name="line.33"></a>
<span class="sourceLineNo">034</span>  public static final String NOT = " NOT ";<a name="line.34"></a>
<span class="sourceLineNo">035</span><a name="line.35"></a>
<span class="sourceLineNo">036</span>  /* 02.Comparisons */<a name="line.36"></a>
<span class="sourceLineNo">037</span>  public static final String GREATER = " &gt; ";<a name="line.37"></a>
<span class="sourceLineNo">038</span>  public static final String LESS = " &lt; ";<a name="line.38"></a>
<span class="sourceLineNo">039</span>  public static final String EQUAL = " = ";<a name="line.39"></a>
<span class="sourceLineNo">040</span>  public static final String GREATER_EQUAL = " &gt;= ";<a name="line.40"></a>
<span class="sourceLineNo">041</span>  public static final String LESS_EQUAL = " &lt;= ";<a name="line.41"></a>
<span class="sourceLineNo">042</span>  public static final String NOT_EQUAL = " != ";<a name="line.42"></a>
<span class="sourceLineNo">043</span>  public static final String NOT_EQUAL2 = " &lt;&gt; ";<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span>  /* 03.IS NULL, IS NOT NULL */<a name="line.45"></a>
<span class="sourceLineNo">046</span>  public static final String IS_NULL = " IS NULL ";<a name="line.46"></a>
<span class="sourceLineNo">047</span>  public static final String IS_NOT_NULL = " IS NOT NULL ";<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span>  /* 04.LIKE */<a name="line.49"></a>
<span class="sourceLineNo">050</span>  public static final String LIKE = " LIKE ";<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span>  /* 05.BETWEEN介于两个值之间的数据范围BETWEEN同AND一起搭配使用. */<a name="line.52"></a>
<span class="sourceLineNo">053</span>  public static final String BETWEEN = " BETWEEN ";<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span>  /* 06.IN */<a name="line.55"></a>
<span class="sourceLineNo">056</span>  public static final String IN = " IN ";<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span>  /* 07.EXISTS */<a name="line.58"></a>
<span class="sourceLineNo">059</span>  public static final  String EXISTS = " EXISTS ";<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span>  /*<a name="line.61"></a>
<span class="sourceLineNo">062</span>   * Quantified comparison<a name="line.62"></a>
<span class="sourceLineNo">063</span>   * A quantified comparison is a comparison operator (&lt;, =, &gt;, &lt;=, &gt;=, &lt;&gt;) with ALL or ANY or<a name="line.63"></a>
<span class="sourceLineNo">064</span>   * SOME applied.<a name="line.64"></a>
<span class="sourceLineNo">065</span>   * Operates on table subqueries, which can return multiple rows but must return a single column.<a name="line.65"></a>
<span class="sourceLineNo">066</span>   * If ALL is used, the comparison must be true for all values returned by the table subquery.<a name="line.66"></a>
<span class="sourceLineNo">067</span>   * If ANY or SOME is used, the comparison must be true for at least one value of the table<a name="line.67"></a>
<span class="sourceLineNo">068</span>   * subquery. ANY and SOME are equivalent.<a name="line.68"></a>
<span class="sourceLineNo">069</span>   *<a name="line.69"></a>
<span class="sourceLineNo">070</span>   * WHERE normal_rate &lt; ALL<a name="line.70"></a>
<span class="sourceLineNo">071</span>   * (SELECT budget/550 FROM Groups)<a name="line.71"></a>
<span class="sourceLineNo">072</span>   *<a name="line.72"></a>
<span class="sourceLineNo">073</span>   * Expression<a name="line.73"></a>
<span class="sourceLineNo">074</span>   *   ComparisonOperator<a name="line.74"></a>
<span class="sourceLineNo">075</span>   *   {<a name="line.75"></a>
<span class="sourceLineNo">076</span>   *     ALL |<a name="line.76"></a>
<span class="sourceLineNo">077</span>   *     ANY |<a name="line.77"></a>
<span class="sourceLineNo">078</span>   *     SOME<a name="line.78"></a>
<span class="sourceLineNo">079</span>   *   }<a name="line.79"></a>
<span class="sourceLineNo">080</span>   *   TableSubquery<a name="line.80"></a>
<span class="sourceLineNo">081</span>   */<a name="line.81"></a>
<span class="sourceLineNo">082</span>  private StringBuffer buf;<a name="line.82"></a>
<span class="sourceLineNo">083</span>  private List&lt;Object&gt; values;<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>  /**<a name="line.85"></a>
<span class="sourceLineNo">086</span>   * 构造函数.<a name="line.86"></a>
<span class="sourceLineNo">087</span>   * @since 0.0.1<a name="line.87"></a>
<span class="sourceLineNo">088</span>   */<a name="line.88"></a>
<span class="sourceLineNo">089</span>  public Condition() {<a name="line.89"></a>
<span class="sourceLineNo">090</span>    this.buf = new StringBuffer();<a name="line.90"></a>
<span class="sourceLineNo">091</span>    this.values = new ArrayList&lt;&gt;();<a name="line.91"></a>
<span class="sourceLineNo">092</span>  }<a name="line.92"></a>
<span class="sourceLineNo">093</span><a name="line.93"></a>
<span class="sourceLineNo">094</span>  /**<a name="line.94"></a>
<span class="sourceLineNo">095</span>   * 获取条件文中所有的值.<a name="line.95"></a>
<span class="sourceLineNo">096</span>   * @return 条件文中所有的值。<a name="line.96"></a>
<span class="sourceLineNo">097</span>   * @since 0.0.1<a name="line.97"></a>
<span class="sourceLineNo">098</span>   */<a name="line.98"></a>
<span class="sourceLineNo">099</span>  public List&lt;?&gt; getValues() {<a name="line.99"></a>
<span class="sourceLineNo">100</span>    return this.values;<a name="line.100"></a>
<span class="sourceLineNo">101</span>  }<a name="line.101"></a>
<span class="sourceLineNo">102</span><a name="line.102"></a>
<span class="sourceLineNo">103</span>  private void makeBuffer(String cond, Object value) {<a name="line.103"></a>
<span class="sourceLineNo">104</span>    if (Condition.BETWEEN.equals(cond)) {<a name="line.104"></a>
<span class="sourceLineNo">105</span>      this.buf.append(" ? AND ? ");<a name="line.105"></a>
<span class="sourceLineNo">106</span>      if (value instanceof Object[]) {<a name="line.106"></a>
<span class="sourceLineNo">107</span>        this.values.add(((Object[]) value)[0]);<a name="line.107"></a>
<span class="sourceLineNo">108</span>        this.values.add(((Object[]) value)[1]);<a name="line.108"></a>
<span class="sourceLineNo">109</span>      }<a name="line.109"></a>
<span class="sourceLineNo">110</span>      if (value instanceof List&lt;?&gt;) {<a name="line.110"></a>
<span class="sourceLineNo">111</span>        this.values.add(((List&lt;?&gt;) value).get(0));<a name="line.111"></a>
<span class="sourceLineNo">112</span>        this.values.add(((List&lt;?&gt;) value).get(1));<a name="line.112"></a>
<span class="sourceLineNo">113</span>      }<a name="line.113"></a>
<span class="sourceLineNo">114</span>    } else if (Condition.IN.equals(cond)) {<a name="line.114"></a>
<span class="sourceLineNo">115</span>      // IN 条件时的处理<a name="line.115"></a>
<span class="sourceLineNo">116</span>      // SELECT * FROM HOGE WHERE ID IN (?,?,?)<a name="line.116"></a>
<span class="sourceLineNo">117</span>      if (value instanceof Object[]) {<a name="line.117"></a>
<span class="sourceLineNo">118</span>        this.buf.append(" ( ");<a name="line.118"></a>
<span class="sourceLineNo">119</span>        Object[] coll = (Object[]) value;<a name="line.119"></a>
<span class="sourceLineNo">120</span>        for (int idx = 0; idx &lt; coll.length; idx ++) {<a name="line.120"></a>
<span class="sourceLineNo">121</span>          Object val = coll[idx];<a name="line.121"></a>
<span class="sourceLineNo">122</span>          this.buf.append(" ? ");<a name="line.122"></a>
<span class="sourceLineNo">123</span>          if ((idx + 1) &lt; coll.length) {<a name="line.123"></a>
<span class="sourceLineNo">124</span>            this.buf.append(" , ");<a name="line.124"></a>
<span class="sourceLineNo">125</span>          }<a name="line.125"></a>
<span class="sourceLineNo">126</span>          this.values.add(val);<a name="line.126"></a>
<span class="sourceLineNo">127</span>        }<a name="line.127"></a>
<span class="sourceLineNo">128</span>        this.buf.append(" ) ");<a name="line.128"></a>
<span class="sourceLineNo">129</span>      }<a name="line.129"></a>
<span class="sourceLineNo">130</span><a name="line.130"></a>
<span class="sourceLineNo">131</span>      if (value instanceof List&lt;?&gt;) {<a name="line.131"></a>
<span class="sourceLineNo">132</span>        this.buf.append(" (");<a name="line.132"></a>
<span class="sourceLineNo">133</span>        List&lt;?&gt; coll = (List&lt;?&gt;) value;<a name="line.133"></a>
<span class="sourceLineNo">134</span>        for (int idx = 0; idx &lt;  coll.size(); idx ++) {<a name="line.134"></a>
<span class="sourceLineNo">135</span>          Object val = coll.get(idx);<a name="line.135"></a>
<span class="sourceLineNo">136</span>          this.buf.append(" ? ");<a name="line.136"></a>
<span class="sourceLineNo">137</span>          if ((idx + 1) &lt; coll.size()) {<a name="line.137"></a>
<span class="sourceLineNo">138</span>            this.buf.append(" , ");<a name="line.138"></a>
<span class="sourceLineNo">139</span>          }<a name="line.139"></a>
<span class="sourceLineNo">140</span>          this.values.add(val);<a name="line.140"></a>
<span class="sourceLineNo">141</span>        }<a name="line.141"></a>
<span class="sourceLineNo">142</span>        this.buf.append(") ");<a name="line.142"></a>
<span class="sourceLineNo">143</span>      }<a name="line.143"></a>
<span class="sourceLineNo">144</span>    } else {<a name="line.144"></a>
<span class="sourceLineNo">145</span>      if ((!Condition.IS_NULL.equals(cond)) &amp;&amp; (!Condition.IS_NOT_NULL.equals(cond))) {<a name="line.145"></a>
<span class="sourceLineNo">146</span>        this.buf.append(" ? ");<a name="line.146"></a>
<span class="sourceLineNo">147</span>        this.values.add(value);<a name="line.147"></a>
<span class="sourceLineNo">148</span>      }<a name="line.148"></a>
<span class="sourceLineNo">149</span>    }<a name="line.149"></a>
<span class="sourceLineNo">150</span>  }<a name="line.150"></a>
<span class="sourceLineNo">151</span>  /**<a name="line.151"></a>
<span class="sourceLineNo">152</span>   * 向条件类中追加包括Where语句的条件.<a name="line.152"></a>
<span class="sourceLineNo">153</span>   * @param column 字段。<a name="line.153"></a>
<span class="sourceLineNo">154</span>   * @param cond 关系。<a name="line.154"></a>
<span class="sourceLineNo">155</span>   * @param value 值。<a name="line.155"></a>
<span class="sourceLineNo">156</span>   * @since 0.0.1<a name="line.156"></a>
<span class="sourceLineNo">157</span>   * @since 0.0.2 IN 条件修改<a name="line.157"></a>
<span class="sourceLineNo">158</span>   */<a name="line.158"></a>
<span class="sourceLineNo">159</span>  public Condition where(String column, String cond, Object value) {<a name="line.159"></a>
<span class="sourceLineNo">160</span>    this.buf.append(" WHERE ");<a name="line.160"></a>
<span class="sourceLineNo">161</span>    this.buf.append(column);<a name="line.161"></a>
<span class="sourceLineNo">162</span>    this.buf.append(cond);<a name="line.162"></a>
<span class="sourceLineNo">163</span>    this.makeBuffer(cond, value);<a name="line.163"></a>
<span class="sourceLineNo">164</span>    return this;<a name="line.164"></a>
<span class="sourceLineNo">165</span>  }<a name="line.165"></a>
<span class="sourceLineNo">166</span><a name="line.166"></a>
<span class="sourceLineNo">167</span>  /**<a name="line.167"></a>
<span class="sourceLineNo">168</span>   * 向条件类中追加AND条件.<a name="line.168"></a>
<span class="sourceLineNo">169</span>   * @param column 字段。<a name="line.169"></a>
<span class="sourceLineNo">170</span>   * @param cond 关系。<a name="line.170"></a>
<span class="sourceLineNo">171</span>   * @param value 值。<a name="line.171"></a>
<span class="sourceLineNo">172</span>   * @since 0.0.1<a name="line.172"></a>
<span class="sourceLineNo">173</span>   */<a name="line.173"></a>
<span class="sourceLineNo">174</span>  public Condition and(String column, String cond, Object value) {<a name="line.174"></a>
<span class="sourceLineNo">175</span>    this.buf.append(" AND ");<a name="line.175"></a>
<span class="sourceLineNo">176</span>    this.buf.append(column);<a name="line.176"></a>
<span class="sourceLineNo">177</span>    this.buf.append(cond);<a name="line.177"></a>
<span class="sourceLineNo">178</span>    this.makeBuffer(cond, value);<a name="line.178"></a>
<span class="sourceLineNo">179</span>    return this;<a name="line.179"></a>
<span class="sourceLineNo">180</span>  }<a name="line.180"></a>
<span class="sourceLineNo">181</span><a name="line.181"></a>
<span class="sourceLineNo">182</span>  /**<a name="line.182"></a>
<span class="sourceLineNo">183</span>   * 向条件类中追加OR条件.<a name="line.183"></a>
<span class="sourceLineNo">184</span>   * @param column 字段。<a name="line.184"></a>
<span class="sourceLineNo">185</span>   * @param cond 关系。<a name="line.185"></a>
<span class="sourceLineNo">186</span>   * @param value 值。<a name="line.186"></a>
<span class="sourceLineNo">187</span>   * @since 0.0.1<a name="line.187"></a>
<span class="sourceLineNo">188</span>   */<a name="line.188"></a>
<span class="sourceLineNo">189</span>  public Condition or(String column, String cond, Object value) {<a name="line.189"></a>
<span class="sourceLineNo">190</span>    this.buf.append(" OR ");<a name="line.190"></a>
<span class="sourceLineNo">191</span>    this.buf.append(column);<a name="line.191"></a>
<span class="sourceLineNo">192</span>    this.buf.append(cond);<a name="line.192"></a>
<span class="sourceLineNo">193</span>    this.makeBuffer(cond, value);<a name="line.193"></a>
<span class="sourceLineNo">194</span>    return this;<a name="line.194"></a>
<span class="sourceLineNo">195</span>  }<a name="line.195"></a>
<span class="sourceLineNo">196</span><a name="line.196"></a>
<span class="sourceLineNo">197</span>  /**<a name="line.197"></a>
<span class="sourceLineNo">198</span>   * 向条件类中追加AND条件.<a name="line.198"></a>
<span class="sourceLineNo">199</span>   * @param column 字段。<a name="line.199"></a>
<span class="sourceLineNo">200</span>   * @param cond 关系。<a name="line.200"></a>
<span class="sourceLineNo">201</span>   * @param value 值。<a name="line.201"></a>
<span class="sourceLineNo">202</span>   * @since 0.0.1<a name="line.202"></a>
<span class="sourceLineNo">203</span>   */<a name="line.203"></a>
<span class="sourceLineNo">204</span>  public Condition not(String column, String cond, Object value) {<a name="line.204"></a>
<span class="sourceLineNo">205</span>    this.buf.append(" NOT ");<a name="line.205"></a>
<span class="sourceLineNo">206</span>    this.buf.append(column);<a name="line.206"></a>
<span class="sourceLineNo">207</span>    this.buf.append(cond);<a name="line.207"></a>
<span class="sourceLineNo">208</span>    this.makeBuffer(cond, value);<a name="line.208"></a>
<span class="sourceLineNo">209</span>    return this;<a name="line.209"></a>
<span class="sourceLineNo">210</span>  }<a name="line.210"></a>
<span class="sourceLineNo">211</span><a name="line.211"></a>
<span class="sourceLineNo">212</span>  /**<a name="line.212"></a>
<span class="sourceLineNo">213</span>   * 向条件类中追加子条件.<a name="line.213"></a>
<span class="sourceLineNo">214</span>   * @param cond 条件。<a name="line.214"></a>
<span class="sourceLineNo">215</span>   * @since 0.0.1<a name="line.215"></a>
<span class="sourceLineNo">216</span>   */<a name="line.216"></a>
<span class="sourceLineNo">217</span>  public void addCond(Condition cond) {<a name="line.217"></a>
<span class="sourceLineNo">218</span>    this.buf.append(" ( ");<a name="line.218"></a>
<span class="sourceLineNo">219</span>    this.buf.append(cond);<a name="line.219"></a>
<span class="sourceLineNo">220</span>    this.buf.append(" ) ");<a name="line.220"></a>
<span class="sourceLineNo">221</span>    this.values.addAll(cond.getValues());<a name="line.221"></a>
<span class="sourceLineNo">222</span>  }<a name="line.222"></a>
<span class="sourceLineNo">223</span><a name="line.223"></a>
<span class="sourceLineNo">224</span>  /**<a name="line.224"></a>
<span class="sourceLineNo">225</span>   * 返回条件的字符串表示形式.<a name="line.225"></a>
<span class="sourceLineNo">226</span>   * @return String 字符串表示形式。<a name="line.226"></a>
<span class="sourceLineNo">227</span>   * @see java.lang.Object#toString()<a name="line.227"></a>
<span class="sourceLineNo">228</span>   * @since 0.0.1<a name="line.228"></a>
<span class="sourceLineNo">229</span>   */<a name="line.229"></a>
<span class="sourceLineNo">230</span>  @Override<a name="line.230"></a>
<span class="sourceLineNo">231</span>  public String toString() {<a name="line.231"></a>
<span class="sourceLineNo">232</span>    return buf.toString();<a name="line.232"></a>
<span class="sourceLineNo">233</span>  }<a name="line.233"></a>
<span class="sourceLineNo">234</span>}<a name="line.234"></a>




























































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